Revisamos la declaración de la renta.

Revisamos is the 1st person plural form of revisar, so it means we review, we check, or depending on context, we are reviewing.

Conjugation of revisar in the present:

• yo reviso
• tú revisas
• él/ella/usted revisa
• nosotros/nosotras revisamos
• vosotros/vosotras revisáis
• ellos/ellas/ustedes revisan

So revisamos matches we.

It can mean either one, depending on context.

For many -ar verbs, the nosotros form is the same in:

• the present tense: we review
• the preterite: we reviewed

So revisamos could mean:

• We review the tax return
• We reviewed the tax return

Usually, the surrounding context makes it clear. For example:

• Cada año revisamos la declaración de la renta. = Every year we review the tax return.
• Ayer revisamos la declaración de la renta. = Yesterday we reviewed the tax return.

Spanish often drops subject pronouns because the verb ending already shows who the subject is.

Since revisamos already tells you the subject is we, you do not need nosotros.

So both are possible:

• Revisamos la declaración de la renta.
• Nosotros revisamos la declaración de la renta.

The version without nosotros is more natural in many situations.
You would include nosotros mainly for emphasis or contrast:

• Nosotros revisamos la declaración de la renta, no ellos.

Because Spanish often uses the definite article where English may or may not use the.

Here, la declaración means the tax return or the income tax return. It refers to a specific thing understood from context.

So:

• declaración = declaration/return
• la declaración = the declaration / the return

In this expression, using la sounds natural and standard.

In Spain, la declaración de la renta is the standard everyday expression for an income tax return.

A very natural English equivalent is:

• the tax return
• the income tax return

In Spain, people often talk about:

• hacer la declaración de la renta = to do/file your tax return
• presentar la declaración de la renta = to submit/file your tax return
• revisar la declaración de la renta = to review/check your tax return

So this is a very normal Spain-specific phrase.

Because renta is a feminine noun, so it takes la, not el.

• el
  • de = del
• la
  • de stays de la

So:

• de el libro → del libro
• de la renta → de la renta

Since it is la renta, the phrase must be de la renta.

Here, renta refers to income for tax purposes.

By itself, renta can have several related meanings depending on context, such as:

• income
• earnings
• rent
• revenue

But in the fixed expression declaración de la renta, it specifically refers to the income tax return.

So learners should treat la declaración de la renta as a set phrase, not translate each word too literally every time.

You might hear other tax-related expressions, but in Spain la declaración de la renta is the normal and specific phrase for an income tax return.

Compare:

• declaración de la renta = income tax return
• impuestos = taxes in general

So declaración de impuestos is not the usual everyday Spain expression for this exact idea.
If you are talking about the yearly personal income tax return in Spain, declaración de la renta is the phrase to remember.

Yes, revisar works very well here. It suggests looking over something carefully, checking it, or reviewing it.

Depending on context, other verbs are possible:

• comprobar = to check/verify
• examinar = to examine
• mirar = to look at

But revisar la declaración de la renta is very natural if you mean checking the tax return for mistakes or reviewing its contents.

Because la declaración de la renta is a thing, not a specific person.

The personal a is normally used before a direct object that is a person:

• Veo a María.

But here the direct object is la declaración de la renta, which is a document, so no a is used:

• Revisamos la declaración de la renta.

Yes, but the basic order here is the most neutral and common:

• Revisamos la declaración de la renta.

Spanish can change word order for emphasis:

• La declaración de la renta la revisamos mañana.
• Nosotros revisamos la declaración de la renta.

Still, for a simple statement, verb + object is perfectly normal and natural.

A simple pronunciation guide is:

reh-bee-SAH-mos la deh-klah-rah-see-ON deh la RREN-tah

A few notes:

• v in revisamos is usually pronounced very similarly to b in Spanish.
• ción in declaración is stressed on the last syllable: -ÓN
• renta has a tapped r
• In most of Spain, c before i in declaración sounds like the th in think

So in much of Spain, declaración sounds roughly like: deh-klah-rah-thy-ON

Yes. In Spain, people often shorten it to simply:

• la renta

For example:

• Tengo que hacer la renta. = I have to do my tax return.
• Ya he presentado la renta. = I’ve already filed my tax return.

But the full version la declaración de la renta is more explicit and is exactly what appears in your sentence.