La declaración individual es del ejercicio fiscal.

Because declaración is a feminine noun in Spanish, so it takes the feminine article la.

A useful pattern:

• nouns ending in -ción are almost always feminine
  
  • la declaración
  • la información
  • la conversación

So even if the English equivalent does not feel especially feminine, in Spanish the grammatical gender must match.

In Spanish, adjectives often come after the noun, unlike in English.

So:

• declaración individual
• literally: declaration individual
• natural English order: individual declaration

This is the normal position for a descriptive adjective. Putting it before the noun would sound unusual here and could change the emphasis.

Yes, individual is an adjective describing declaración, and adjectives normally agree in gender and number with the noun.

Here:

• declaración = feminine singular
• individual = singular form

Some adjectives, like individual, have the same form for masculine and feminine in the singular:

• la declaración individual
• el plan individual

But the plural changes:

• las declaraciones individuales
• los planes individuales

Because ser is used for identification, classification, and essential description, while estar is more for states, conditions, or location.

Here, es del ejercicio fiscal is classifying or identifying what something belongs to, so ser is the natural choice.

Compare:

• Es del ejercicio fiscal 2024. = It is from / belongs to tax year 2024.
• Está en la carpeta azul. = It is in the blue folder.

So this sentence is about what kind of declaration it is or which fiscal year it corresponds to, not where it is or what temporary state it is in.

Because de + el contracts to del in Spanish.

So:

• de + el ejercicio fiscal → del ejercicio fiscal

This contraction is required in standard Spanish.

Compare:

• del coche = de el coche ❌
• del libro = de el libro ❌

One important exception:

• de + él (with the pronoun él, meaning him) does not contract
  
  • Hablo de él.

Ejercicio fiscal is a set phrase meaning fiscal year or tax year, depending on context.

A few notes:

• ejercicio can mean exercise in many contexts, but in financial/administrative language it often means an accounting period or financial year
• fiscal means tax-related or fiscal

So as a chunk, ejercicio fiscal should be learned as one administrative expression rather than word-by-word.

Because they belong to different nouns, and each noun has its own gender:

• la declaración → declaración is feminine
• el ejercicio fiscal → ejercicio is masculine

The article must match the noun it goes with. The fact that both appear in the same sentence does not matter.

Yes, but it would mean something slightly different.

• es del ejercicio fiscal suggests a specific fiscal year already known from context
• es de un ejercicio fiscal means it is from a fiscal year, which sounds more indefinite and less natural in many real situations

So if you are referring to a particular tax year, del ejercicio fiscal is the more likely choice.

It can function like a standard administrative phrase, especially in tax contexts. It often contrasts with things like:

• declaración conjunta = joint return
• declaración individual = individual return

Even though it is grammatically just a noun plus adjective, in real-life bureaucratic Spanish it behaves a lot like a set phrase you should recognize as a whole.

Yes, but the original order is the most neutral and natural.

For example:

• La declaración individual es del ejercicio fiscal. = neutral statement
• Del ejercicio fiscal es la declaración individual. = possible, but marked and unusual without a special context

Spanish allows more flexibility than English, but not every possible order sounds equally natural. For a learner, the original version is the safest one to use.

It would become:

• Las declaraciones individuales son del ejercicio fiscal.

Changes:

• la → las
• declaración → declaraciones
• individual → individuales
• es → son

Notice that del ejercicio fiscal stays singular if you still mean one specific fiscal year.

Because fiscal is an adjective modifying ejercicio, not a noun needing its own article.

So the structure is:

• el ejercicio fiscal
• article + noun + adjective

Just like:

• el coche rojo
• la casa grande

Here:

• ejercicio = noun
• fiscal = adjective

Sometimes, yes, depending on the wider context. Spanish de often covers several relationships that English expresses in different ways.

So del ejercicio fiscal might be understood in English as:

• of the fiscal year
• from the fiscal year
• for the fiscal year

The best English wording depends on the document or situation. Grammatically, though, Spanish uses de to link the declaration to the fiscal year.