Csatoljuk az okiratot.

Because Hungarian verbs have two main conjugation patterns:

• indefinite conjugation: used when there is no direct object, or the object is indefinite
• definite conjugation: used when the direct object is definite

Here the object is az okiratot = the document/deed/instrument, which is definite, so the verb must also be in the definite form:

• csatoljuk = we attach it / we are attaching the ...
• csatolunk would be used with an indefinite object, for example Csatolunk egy okiratot = We are attaching a document

So csatoljuk agrees with the fact that the object is definite.

In this sentence, -juk marks:

• first person plural = we
• definite conjugation
• present tense

So csatoljuk means roughly we attach it / we attach the ...

The subject we does not need to be stated separately, because Hungarian verb endings already show the subject.

Hungarian usually leaves out subject pronouns unless they are needed for emphasis or contrast.

So:

• Csatoljuk az okiratot. = We attach the document.
• Mi csatoljuk az okiratot. = We are the ones attaching the document.

The version without mi is the normal, neutral one.

There are two things happening here:

1. az is the definite article, meaning the
2. -ot is the accusative ending, marking the direct object

So:

• okirat = document / deed / instrument
• az okirat = the document
• az okiratot = the document as the direct object of the verb

Hungarian usually marks direct objects with an accusative ending.

Hungarian has two forms of the definite article:

• a before a consonant sound
• az before a vowel sound

Since okiratot begins with o, the article is az:

• az okiratot

Compare:

• a dokumentumot
• az iratot

Okirat is a fairly formal, legal, or administrative word. It often means something like:

• document
• deed
• legal instrument
• official written record

In everyday language, a Hungarian speaker might more often say dokumentum or irat, depending on context.
So okirat sounds more official than a plain everyday document.

It can cover several of those ideas depending on context.

Grammatically, it is present tense: we attach the document.

But in formal writing, especially in letters or emails, Hungarian often uses this kind of present tense in a performative way, meaning something like:

• We enclose the document
• We attach the document
• Please find the document attached

So in real-life administrative context, it often sounds more natural in English as a formal correspondence phrase rather than a literal ongoing action.

Yes, you could say Az okiratot csatoljuk, but the emphasis changes.

• Csatoljuk az okiratot. = neutral, matter-of-fact
• Az okiratot csatoljuk. = puts more attention on the document

Hungarian word order is strongly connected to emphasis and information structure, not just grammar.
The sentence you were given sounds natural as a neutral formal statement.

In some contexts, forms like this can look similar to imperative/subjunctive forms, so a learner may notice possible ambiguity.

However, in this sentence, Csatoljuk az okiratot. is naturally understood as a statement: We attach the document.

If someone wanted to say Let us attach the document, context and intonation would normally make that clear, and in formal written language this sentence is usually read as an ordinary declarative sentence.

So for practical purposes here, you should understand it as a statement, not a suggestion.

A rough pronunciation guide:

• cs sounds like English ch
• j sounds like English y
• stress is on the first syllable of each word

So roughly:

• CSA-to-lyuk az O-ki-ra-tot

More closely:

• csatoljuk ≈ cha-tol-yook
• az ≈ awz
• okiratot ≈ o-kee-ra-tot

Also, Hungarian pronunciation is usually very regular, much more predictable than English spelling.