Als de scanner niet werkt, moet ik het document later vanaf mijn werkplek opnieuw opsturen.

Because als de scanner niet werkt is a subordinate clause.

In Dutch subordinate clauses, the finite verb usually goes to the end. So:

• de scanner werkt niet = the scanner does not work
• als de scanner niet werkt = if the scanner does not work

This is a very common pattern:

• Als ik tijd heb = if I have time
• Omdat hij ziek is = because he is ill
• Dat ze komt = that she is coming

So the verb werkt moves to the end because of als.

Because the sentence starts with the subordinate clause Als de scanner niet werkt.

When a Dutch main clause comes after an introductory element like this, the verb comes before the subject. This is the normal verb-second rule in Dutch.

So the structure is:

• Als de scanner niet werkt, moet ik ...

Literally, Dutch is doing something like:

• If the scanner does not work, must I ...

But in natural English we say:

• If the scanner doesn’t work, I must ...

More examples:

• Morgen ga ik naar kantoor. = Tomorrow I’m going to the office.
• Als het regent, blijf ik thuis. = If it rains, I’m staying home.

So moet ik is correct because the als-clause takes the first position, and the main verb must come next.

Here, als means if.

In Dutch, als can sometimes mean when in everyday language, especially in spoken Dutch, but in this sentence the meaning is clearly conditional:

• Als de scanner niet werkt = If the scanner doesn’t work

So it is expressing a condition, not a time.

A learner should remember:

• als often = if
• wanneer can also mean when
• in informal Dutch, als is often used where English would use when

But in this sentence, if is the best match.

Because Dutch nouns have two grammatical genders/article types:

• de words
• het words

So:

• de scanner
• het document

Unfortunately, this usually has to be learned with the noun.

A useful thing to remember:

• singular nouns take either de or het
• all plural nouns take de

So:

• de scanner
• de scanners
• het document
• de documenten

Because in a subordinate clause, niet usually comes before the final verb.

Compare:

• Main clause: De scanner werkt niet.
• Subordinate clause: Als de scanner niet werkt

In the subordinate clause, the verb goes to the end, and niet is placed before it.

This is a very common pattern:

• omdat ik het niet weet = because I do not know it
• als hij niet komt = if he does not come

So niet werkt is exactly what you would expect in a subordinate clause.

Later means later or at a later time.

In this sentence it tells you when the document will be sent again:

• moet ik het document later ... opsturen
  = I have to send the document later ...

Dutch word order allows some flexibility, so you may also see:

• Als de scanner niet werkt, moet ik later het document opnieuw opsturen.
• Ik moet het document later opnieuw opsturen.

The exact position can shift depending on emphasis, but later is functioning as a time adverb.

It means something like from my workstation / from my desk / from my place of work.

• werkplek = workstation, workspace, desk, place where you work
• vanaf = from, starting from

So vanaf mijn werkplek suggests the action will be done using that location as the starting point.

Depending on context, English might translate it more naturally as:

• from my workstation
• from my desk
• from work

It sounds like the speaker will resend the document once they are back at their own working setup.

Vanaf often emphasizes a starting point more clearly than van.

• van = from
• vanaf = from, starting from

With places, vanaf can sound a bit more specific about the point of origin. In this sentence, it suggests resending the document from the workstation.

That said, depending on context, Dutch speakers might also use:

• vanuit mijn werkplek
• vanaf mijn werkplek

Vanuit often feels a bit more like from the position of / from out of / using the location as a base.
Vanaf focuses more on the starting point.

So vanaf is not strange here, but it is slightly more specific than simple van.

Yes. Opsturen means to send or to send off.

Opnieuw adds the idea of again:

• opsturen = send
• opnieuw opsturen = send again, resend

So the sentence is not just about sending the document, but about sending it again because something prevented it earlier.

You can compare:

• Ik stuur het document op. = I send the document.
• Ik stuur het document opnieuw op. = I send the document again.

Yes. Opsturen is a separable verb.

The full infinitive is:

• opsturen

But in a normal main clause, it splits:

• Ik stuur het document op.

In this sentence, it stays together because it appears in the infinitive at the end:

• moet ik het document ... opnieuw opsturen

More examples:

• Hij stuurt het pakket op.
• Hij heeft het pakket opgestuurd.
• Hij wil het pakket opsturen.

So:

• finite verb in main clause: split
• infinitive: together
• past participle: opgestuurd

All three can relate to sending something, but they are not always identical in tone.

• opsturen = send off, send in, send
  Common, everyday Dutch.
• versturen = send
  Also common, often used for messages, emails, letters.
• verzenden = dispatch, send
  Slightly more formal or business-like.

In this sentence, opsturen sounds very natural for a document.

Examples:

• Ik stuur het document op. = natural everyday wording
• Ik verstuur het document. = also possible
• Ik verzend het document. = more formal, administrative, or business-like

Yes. Dutch allows that.

For example:

• Ik moet het document later vanaf mijn werkplek opnieuw opsturen als de scanner niet werkt.

That is grammatically possible, but the original version is more natural if you want to present the condition first:

• Als de scanner niet werkt, moet ik ...

Putting the als-clause first is very common when the condition sets up the rest of the sentence.

Because the speaker is talking about a specific document, not just any document.

• het document = the document
• een document = a document

So the sentence suggests that both speaker and listener already know which document is meant.

This is the same distinction as in English:

• I have to resend the document = a specific document
• I have to resend a document = some document, not specified

It has two parts:

1. Subordinate clause
   Als de scanner niet werkt
   = If the scanner doesn’t work

2. Main clause
   moet ik het document later vanaf mijn werkplek opnieuw opsturen
   = I have to resend the document later from my workstation

So the pattern is:

• [subordinate clause], [main clause]

And because the subordinate clause comes first, the main clause begins with the finite verb:

• moet ik

That is one of the most important Dutch word-order patterns to learn.

Yes, within limits.

For example, these are possible or understandable:

• ... moet ik het document later opnieuw opsturen.
• ... moet ik het document opnieuw later opsturen. — much less natural
• ... moet ik opnieuw het document opsturen. — possible, but gives a slightly different emphasis

The most natural position here is the one in your sentence:

• het document later vanaf mijn werkplek opnieuw opsturen

That placement makes it clear that opnieuw belongs with the action opsturen: the sending is being repeated.

In this sentence, moet ik most naturally means I have to.

Dutch moeten can range from:

• strong obligation: must
• practical necessity: have to
• advice/instruction in some contexts

Here it sounds like a practical necessity:

• If the scanner doesn’t work, I have to resend the document later ...

So have to is often the most natural English rendering, even though must is also possible depending on tone.