Lefényképezzük és benyújtjuk a bizonylatot.

Because they are in the 1st person plural definite conjugation: we ... it/them.

• lefényképezzük = we photograph it / we take a photo of it
• benyújtjuk = we submit it

Hungarian uses the definite conjugation when the direct object is definite, and here the object is a bizonylatot = the receipt/document.

If the object were not definite, you would expect indefinite forms such as lefényképezünk and benyújtunk.

Hungarian usually does not need a subject pronoun, because the verb ending already shows the subject.

So lefényképezzük already tells you we photograph it, and benyújtjuk already tells you we submit it.

You could add mi = we, but usually only for emphasis or contrast:

• Mi lefényképezzük és benyújtjuk a bizonylatot. = We will photograph and submit the document.

Because bizonylatot is in the accusative case, which marks the direct object.

• base form: bizonylat
• accusative: bizonylatot

The accusative ending is basically -t, but Hungarian often inserts a vowel before it, so here it becomes -ot.

So:

• a bizonylat = the receipt/document
• a bizonylatot = the receipt/document as the object of the verb

Because both verbs share the same object.

So the structure is:

• [lefényképezzük] és [benyújtjuk] a bizonylatot

This means:

• we photograph the document
• and we submit the document

Hungarian often avoids repeating the same object when it belongs naturally to both verbs.

The verb fényképez means to photograph / take photos.

With le-, lefényképez usually means to take a photo of something specific, often with a sense of completing the action.

So:

• fényképezünk = we take photos / do photography
• lefényképezzük = we take a photo of it

In many prefixed verbs, the prefix adds a sense of boundedness or completion.

The base verb nyújt means things like stretch, extend, or offer/hand depending on context.

With be-, it becomes benyújt, which means submit, hand in, or file.

So here:

• benyújtjuk = we submit it / hand it in

This is a good example of how a Hungarian prefix can change the meaning of a verb quite a lot.

Because of a sound/spelling change that happens when certain verb stems combine with endings.

The verb stem ends in z: fényképez.
The definite ending historically involves j, and z + j becomes zz.

That is why you get:

• néz → nézzük
• főz → főzzük
• fényképez → fényképezzük

So lefényképezzük is the regular form.

Formally, it is present tense.

However, Hungarian very often uses the present tense for future meaning when the context makes it clear.

So this sentence can mean either:

• We photograph and submit the receipt/document or
• We will photograph and submit the receipt/document

The exact time usually comes from context.

Bizonylat is a fairly broad administrative/financial word. It can mean:

• receipt
• voucher
• supporting document
• proof of transaction

So receipt may be the right translation in many contexts, but bizonylat is often a bit more general than everyday English receipt.

Depending on context, Hungarian might also use:

• nyugta = receipt
• számla = invoice/bill

Because Hungarian has two forms of the:

• a before a consonant
• az before a vowel

Since bizonylatot begins with b, the correct form is a:

• a bizonylatot

Compare:

• az űrlapot = the form
  because űrlapot begins with a vowel sound.

No, Hungarian word order is fairly flexible, but different orders give different emphasis or information structure.

This sentence is a natural way to say that we do two actions to the same document:

• Lefényképezzük és benyújtjuk a bizonylatot.

You could also say:

• A bizonylatot lefényképezzük és benyújtjuk.

That version puts the document more in topic position, as something already known or under discussion.

So the word order is not random, but it is also not as rigid as in English.

Then the verbs would normally switch to the indefinite conjugation.

For example:

• Lefényképezünk és benyújtunk egy bizonylatot.

That means something like:

• We photograph and submit a receipt/document.

Compare:

• lefényképezzük / benyújtjuk = definite object
• lefényképezünk / benyújtunk = indefinite object

This definite vs. indefinite distinction is one of the most important features of Hungarian verb conjugation.