El informe ya está escrito, así que puedo descansar.

Está escrito uses estar + past participle to describe a resulting state: the report is now in a written/finished condition.

• El informe está escrito = the report is written / has been written
• It focuses on the current state

By contrast, ser + past participle is the true passive voice and focuses more on the action:

• El informe es escrito por Ana = the report is written by Ana

That version is grammatical, but in everyday Spanish it is less natural here. In this sentence, Spanish prefers está escrito because the important idea is that the report is done.

Because escribir has an irregular past participle:

• escribir → escrito

Many Spanish verbs form the participle regularly with -ado or -ido, but some are irregular. A few common ones are:

• hacer → hecho
• ver → visto
• poner → puesto
• romper → roto
• decir → dicho
• escribir → escrito

So escrito is the correct form.

Ya means already here. It tells you that the action is completed by now or at this point.

• El informe está escrito = The report is written.
• El informe ya está escrito = The report is already written.

So ya adds a sense of completion and often implies relief, progress, or contrast with an earlier situation.

Así que means so, therefore, or so then.

It connects the first idea to the result:

• El informe ya está escrito, así que puedo descansar.
• The report is already written, so I can rest.

It is a very common and natural connector in Spanish. It is less formal than things like por lo tanto or por consiguiente.

Because in Spanish, modal verbs such as poder, querer, deber, and soler are followed directly by an infinitive.

• puedo descansar = I can rest
• quiero comer = I want to eat
• debo estudiar = I must study

English uses to with many verbs, but Spanish does not after poder.

Spanish often leaves out subject pronouns when they are clear from the verb ending.

• puedo already means I can
• so yo is not necessary

You could say:

• ..., así que puedo descansar.
• ..., así que yo puedo descansar.

Both are grammatical, but the version without yo is more natural unless you want emphasis or contrast:

• Tú sigues trabajando, pero yo puedo descansar.

Spanish usually uses the definite article more often than English does.

El informe means the report, referring to a specific report that both speaker and listener can identify.

You would not normally say just informe by itself in a sentence like this. Spanish generally wants an article or some determiner:

• el informe = the report
• un informe = a report
• este informe = this report
• mi informe = my report

The accent marks matter.

• está has a written accent to show the correct stress and to distinguish it from esta:

  • está = is
  • esta = this

• así has a written accent because the stress falls on the last syllable.

So the accents are part of the correct spelling and sometimes help distinguish different words.

Yes, but the meaning and focus are slightly different.

• El informe ya está escrito focuses on the current result/state: it is done.
• El informe ya se ha escrito focuses more on the completed action: it has been written.

In this context, ya está escrito sounds more natural if the point is that the work is finished and now you can rest.

Yes. Spanish word order is more flexible than English word order.

• El informe ya está escrito is neutral and straightforward.
• Ya está escrito el informe is also possible, but it puts a little more emphasis on already written.

So both can work, but the original version is the most neutral and probably the best choice for a learner.

Because descansar is normally used without a reflexive pronoun when it means to rest.

• Necesito descansar. = I need to rest.
• Puedo descansar. = I can rest.

The reflexive form descansarse does exist in some contexts, but for a learner the safest and most standard choice here is simply descansar.