Tak for hjælpen; nu går jeg til bordet igen.

Because Danish uses these two patterns differently:

• tak for + noun
  Example: Tak for hjælpen = thanks for the help
• tak fordi + clause
  Example: Tak fordi du hjalp = thanks because you helped / thanks for helping

So in your sentence, hjælpen is a noun, so tak for is the correct choice.

Hjælpen is the definite form, literally the help.

In Danish, when thanking someone for specific help you have just received, the definite form is very common and natural:

• Tak for hjælpen = thanks for the help

Using tak for hjælp is possible in some contexts, but it sounds more general or less tied to a specific instance of help.

Also, hjælp is a common-gender noun, so its definite singular form is made with -en:

• en hjælp
• hjælpen

Because Danish is a verb-second language in main clauses.

That means the finite verb usually comes in the second position, even if something other than the subject comes first.

So:

• Jeg går til bordet igen nu.
• Nu går jeg til bordet igen.

In the second sentence, nu takes the first position, so går must come next, and jeg comes after the verb.

Because Danish often uses the present tense for something happening right now or in the immediate future.

So Nu går jeg can mean:

• I’m going now
• I’m leaving now
• I’m heading back now

This is very normal in Danish and works much like English present forms such as I’m going now.

It can mean both, depending on context.

In this sentence, går most naturally suggests physical movement on foot, so walk/go are both possible in English. Danish often uses gå where English would simply use go, especially when the movement is clearly on foot.

So here it does not have to sound overly literal. It is a natural choice.

Til means to or toward.

So går til bordet means goes to the table.

This is used for movement toward a destination. Compare:

• til bordet = to the table
• ved bordet = at/by the table

So:

• Jeg går til bordet = I’m going to the table
• Jeg sidder ved bordet = I’m sitting at the table

Because bord is a neuter noun.

In Danish, the indefinite article tells you the noun’s gender:

• et bord = a table

To make it definite, Danish usually adds the article as an ending:

• bordet = the table

So the sentence uses bordet because it refers to a specific table already understood from the situation.

Literally, igen usually means again, but in context it can often be translated more naturally as back.

Here it means that the speaker is returning to the table they were at before. So English might say:

• again
• back

depending on what sounds most natural.

If you want to make the idea of returning even clearer in Danish, you can use tilbage:

• Nu går jeg tilbage til bordet.

That is a very clear way to say Now I’m going back to the table.

No, it is not necessary, but it is correct.

The semicolon links two closely related independent clauses:

• Tak for hjælpen
• nu går jeg til bordet igen

It gives a slightly more formal or carefully written feel. A full stop would also be completely natural:

• Tak for hjælpen. Nu går jeg til bordet igen.

So the semicolon is a style choice, not a grammar requirement.