O contribuinte revisa a declaração do Imposto de Renda.

Contribuinte means taxpayer.

More literally, it comes from the idea of someone who contributes/pays taxes. In everyday Brazilian Portuguese, it is a common formal word in tax, legal, and government contexts.

So in this sentence, o contribuinte = the taxpayer.

O is the masculine singular definite article, meaning the.

So:

• o contribuinte = the taxpayer

Portuguese uses definite articles more often than English does, so seeing o, a, os, or as is very normal.

In this sentence, o contribuinte can refer to:

• a specific taxpayer, or
• a generic taxpayer as a category, like the taxpayer reviews the income tax return

Contribuinte is one of those nouns that often has the same form for both masculine and feminine.

So you can say:

• o contribuinte = the male taxpayer / the taxpayer
• a contribuinte = the female taxpayer

The article tells you the gender here, not the ending of the noun itself.

Revisa is the present indicative form of the verb revisar.

It means:

• reviews
• is reviewing
• sometimes reviews regularly, depending on context

Conjugation:

• eu reviso = I review
• você/ele/ela revisa = you/he/she reviews
• o contribuinte revisa = the taxpayer reviews

Portuguese simple present can cover both a habitual meaning and a present-time meaning, just like English sometimes can.

Not always in the same way. This is a very useful point.

In Portuguese, revisar often means:

• to review
• to check
• to go over carefully

So in this sentence, revisa a declaração is best understood as:

• reviews the tax return
• checks the tax return

English revise often means make changes in order to improve something, especially in British English or in study contexts. Portuguese revisar can include correction, but in many practical contexts it is closer to review/check.

Because declaração is a feminine singular noun.

So:

• a declaração = the declaration / the return

In Brazilian tax language, declaração often refers to a tax return or tax declaration.

Examples:

• a declaração de imposto = the tax return
• enviar a declaração = to submit the return
• corrigir a declaração = to correct the return

Because do is a contraction of de + o, and it refers to Imposto, not to declaração.

Break it down:

• imposto = tax
• o imposto = the tax
• de + o = do

So:

• a declaração do Imposto de Renda = the declaration/return of the income tax

The noun declaração is feminine, but that does not control the article inside do Imposto de Renda. That article belongs to Imposto, which is masculine.

Literally, Imposto de Renda means Income Tax.

Breakdown:

• imposto = tax
• renda = income

So:

• Imposto de Renda = income tax

In Brazil, this is the standard name for income tax, and the tax return is commonly called:

• declaração do Imposto de Renda

It is often capitalized because it refers to the official name of the tax.

So writing:

• Imposto de Renda

makes sense in formal or administrative contexts.

However, in less formal writing, you may also see lowercase:

• imposto de renda

Both appear in real life, but capitalization is especially common when referring to the official tax category or in government-style language.

The sentence follows the normal Portuguese word order:

• Subject + Verb + Object

So:

• O contribuinte = subject
• revisa = verb
• a declaração do Imposto de Renda = object

This is the most straightforward and natural order in Portuguese.

In some contexts, yes, but the version with the articles sounds very natural and complete.

For example:

• O contribuinte revisa a declaração do Imposto de Renda.
  Very natural, specific, and standard.

You may also hear shorter forms in headlines, instructions, or informal speech, such as:

• Contribuinte revisa declaração do Imposto de Renda.

That sounds more like a headline or compressed written style. In normal full sentences, keeping the articles is usually best.

Declaração is pronounced approximately like:

• deh-kla-ra-SÃO

The ending -ção is very common in Portuguese and often corresponds to English -tion.

Examples:

• informação = information
• declaração = declaration
• situação = situation

In Brazilian Portuguese, -ção has a nasal sound at the end, which is an important pronunciation feature.

Yes. It sounds natural, especially in a formal, instructional, or administrative context.

It has a typical official/register-neutral tone, like something you might see in:

• a government website
• tax instructions
• a textbook
• a formal example sentence

In casual conversation, a Brazilian might also say something a little simpler depending on context, but this sentence is completely normal and correct.