El ejercicio fiscal falta, de ahí que revisemos los datos fiscales.

Because de ahí que normally introduces a clause in the subjunctive.

So:

• de ahí que revisemos... = hence / which is why we review...

This is a very common pattern:

• De ahí que sea importante...
• De ahí que tengamos dudas...

If you wanted the indicative, Spanish would usually choose a different connector, such as:

• por eso revisamos los datos fiscales
• por lo tanto revisamos los datos fiscales

So the subjunctive here is not random; it is triggered by de ahí que.

It means something like:

• hence
• therefore
• that is why
• which is why

It links the first clause to the consequence in the second clause.

In this sentence:

• El ejercicio fiscal falta, de ahí que revisemos los datos fiscales.

the idea is:

• The fiscal year/accounting period is missing; that is why we review the tax data.

It is a fairly formal connector, especially common in written or administrative language.

Here falta means is missing, is absent, or has not been provided.

So El ejercicio fiscal falta means that the fiscal year/accounting period is not there in the record or information.

This is a very common use of faltar:

• Falta un documento = A document is missing
• Faltan datos = Some data are missing

Be careful: faltar does not usually mean to miss someone in the emotional sense. For that, Spanish commonly uses echar de menos.

Because the subject is singular:

• el ejercicio fiscal = singular

So the verb must also be singular:

• El ejercicio fiscal falta

Compare:

• Falta el ejercicio fiscal = The fiscal year is missing
• Faltan los datos fiscales = The tax data are missing

The verb agrees with whatever is missing.

In everyday Spanish, ejercicio often does mean exercise, but in administrative, financial, and legal contexts it can mean an accounting period or financial year.

So ejercicio fiscal is a set phrase meaning:

• fiscal year
• tax year
• sometimes financial/accounting period, depending on context

This is one of those cases where a familiar word has a more specialized meaning in formal language.

Broadly yes: in both cases fiscal relates to taxation, public finance, or tax/financial administration.

But the exact nuance depends on the noun:

• ejercicio fiscal = the fiscal/tax year or accounting period
• datos fiscales = tax details, tax data, or fiscal information

So the adjective keeps the same general area of meaning, but the full expression changes what it refers to.

Because Spanish often uses the definite article more readily than English, especially when referring to a specific item already understood in context.

So el ejercicio fiscal suggests:

• a particular fiscal year/accounting period
• the one relevant to the document, file, or discussion

In English, you might sometimes drop the article depending on style, but in Spanish el is very natural here.

It is understandable, but many native speakers would find Falta el ejercicio fiscal more natural.

Spanish often places the verb first in statements about something being missing:

• Falta el ejercicio fiscal
• Faltan datos
• Falta una firma

So:

• El ejercicio fiscal falta = possible, but a bit less idiomatic
• Falta el ejercicio fiscal = more natural in many contexts

In formal administrative writing, you might also see alternatives such as:

• No consta el ejercicio fiscal
• No figura el ejercicio fiscal

Because de ahí que introduces a new clause that expresses the result or consequence of the first one, so a pause is natural in writing.

Structure:

• statement: El ejercicio fiscal falta
• consequence: de ahí que revisemos los datos fiscales

The comma helps separate those two parts clearly. In formal written Spanish, this punctuation is very normal here.

Yes. That would be a very natural alternative.

Compare:

• El ejercicio fiscal falta, de ahí que revisemos los datos fiscales.

  • more formal
  • uses subjunctive

• Falta el ejercicio fiscal, por eso revisamos los datos fiscales.

  • more straightforward
  • uses indicative

Both communicate a cause-and-result relationship, but de ahí que sounds more formal and written.