Glossary entry (derived from question below)
Spanish term or phrase:
dentro de un plazo del mismo año fiscal
English translation:
(with)in the same fiscal year / by the end of the fiscal year...
Spanish term
Nicaragua
Professional, Versatile & Trustworthy!
Native in: Spanish
Works in: English to Spanish, Spanish to English
dentro de un plazo del mismo año fiscal
Los préstamos o adelantos anuales se otorgarán sin pago de interés y hasta por monto máximo del 50% del monto por indemnización por antigüedad acumulado al 31 de marzo del año fiscal anterior. Esta cantidad deberá ser resarcida a la Organización dentro de un plazo del mismo año fiscal en el cual es otorgado el préstamo y en cuotas mensuales deducidas de la planilla que no podrán exceder del 50% del salario mensual.
Translation
Annual loans or salary advances will be given/paid to employees on an interest-free basis, up to 50% of the **amount on account of compensation for seniority**, accumulated up to March 31 of the previous fiscal year. This amount should be repaid to the Organization within a fiscal year year in which the loan was paid.
Hola a todos:
Puede que mi consulta parezca un poco trivial, sin embargo mi duda es por la parte que dice "del mismo año fiscal" puesto que dicha expresión sugiere que el préstamo debe pagarse en el mismo año fiscal en que se solicitó y no "al año fiscal" en que se solicitó.
Non-PRO (2): TechLawDC, Yvonne Gallagher
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Proposed translations
Mexico
Trilingually educated, globally trained.
Native in: English (Variants: US, British) 
Works in: Spanish to English, French to English, English to Spanish, and 4 more.
(with)in the same fiscal year / by the end of the fiscal year...
If the fiscal year ends on Dec 31st, that's the deadline for repaying the loan, regardless of when you took the loan out. I don't think any other interpretation is possible here.
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Note added at 51 mins (2020-10-12 19:11:52 GMT)
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In your proposed translation, just replace "a" with "the" and take out the second "year".
Chile
Business communication and health
Native in: Spanish
Works in: English to Spanish, Spanish to English, Spanish, and 1 more.
repay the loan before the end of the company’s tax period/fiscal year
Austria
Retd.T&I, Barrister & Austro-Advokat
Native in: English (Variants: Scottish, British) 
Works in: Spanish to English, English to Spanish, French to English, and 5 more.
within a fiscal-year stub (period)
Stub Period Also known as the interim period. This is the portion of the current fiscal year that has occurred or is reportable so far.
A stub period refers to a short or partial period in a swap or *loan*, or coupons on a bond.
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