El certificado de retenciones indica el ejercicio fiscal.

Because certificado is a masculine singular noun, so it takes the masculine singular definite article el.

• el certificado = the certificate
• la certificación would be a different noun, and feminine

Spanish usually uses the definite article more often than English, especially when talking about a specific document or concept already understood in context.

In Spanish, de + noun is often used to describe the type or purpose of something, without needing an article.

So:

• certificado de retenciones = withholding certificate / certificate of withholdings

This works like a label or category name. Adding las is possible in some contexts, but here it sounds more like a standard document name without it.

Compare:

• un libro de historia = a history book
• una tarjeta de crédito = a credit card
• un certificado de retenciones = a withholding certificate

Here retenciones refers to tax withholdings or amounts withheld, usually from income such as salary.

In Spain, this is common tax vocabulary. A certificado de retenciones is a document showing what amounts were withheld, often for tax purposes.

So retenciones does not mean just any kind of delay or retention here. It has a specific financial/tax meaning.

It is plural because it refers to multiple withholding amounts or withholding entries over a period of time, not just one single withholding.

That is why Spanish normally says:

• retención = one withholding
• retenciones = withholdings in general, often across a tax year

In this phrase, the plural is the natural and usual choice.

Indica is the third person singular present tense of indicar.

The subject is el certificado de retenciones, which is singular, so the verb must also be singular:

• el certificado ... indica = the certificate indicates

If the subject were plural, the verb would change:

• los certificados ... indican

Yes. In this kind of administrative sentence, indica can often be translated as:

• indicates
• shows
• states

All of these can work depending on the tone you want in English.

In Spanish, indicar is very common in formal, official, or bureaucratic language.

Ejercicio fiscal means fiscal year or tax year, depending on context.

In tax and accounting Spanish, ejercicio often refers to a financial or accounting period. So:

• ejercicio fiscal = fiscal/tax year

This is more formal and technical than everyday año.

Both can exist, but ejercicio fiscal is especially common in formal tax, accounting, and administrative language in Spain.

• año fiscal is easier to understand for learners and may appear in some contexts
• ejercicio fiscal sounds more technical and official

So in a document-related sentence like this, ejercicio fiscal is very natural.

Because in Spanish, most adjectives normally come after the noun.

So:

• ejercicio fiscal
• certificado oficial
• documento legal

This is the standard word order. Sometimes adjectives can go before the noun, but that usually changes the tone or meaning, and it would not be normal here.

Yes, Spanish allows more flexible word order than English, but the original sentence is the most natural and neutral.

• El certificado de retenciones indica el ejercicio fiscal = straightforward, standard
• El ejercicio fiscal lo indica el certificado de retenciones = more emphasis on el ejercicio fiscal

The second version sounds more marked or contrastive, not the basic default wording.

Not always exactly, but here it matches well.

Certificado often means an official document that certifies or confirms something:

• certificado de nacimiento = birth certificate
• certificado médico = medical certificate
• certificado de retenciones = withholding certificate

So in this sentence, certificate is a good translation.

Yes, in this sentence you do, because el ejercicio fiscal is the direct object and refers to a specific thing: the fiscal year.

So:

• indica el ejercicio fiscal = indicates the fiscal year

Without el, the sentence would sound incomplete or unnatural here.

Yes, especially in its tax and administrative vocabulary.

Expressions like:

• certificado de retenciones
• ejercicio fiscal

are very typical of official or bureaucratic Spanish used in Spain. Other Spanish-speaking countries may use similar terms, but the exact wording can vary depending on the local tax system.