Numbering, rounding and tax
Invoice and credit-note numbers
- A draft has no number. An invoice gets its number when it is issued, never before, so the numbers have no gaps.
- Each billing entity has its own counter. An invoice number is the entity's Invoice number prefix followed by the counter, for example INV-000042.
- Credit notes have their own counter per billing entity and always start with CN-, for example CN-000001.
- A number is never reused, not even when its invoice is voided.
The fiscal year in numbers
A billing entity's numbers can carry the fiscal year and restart at 1 every fiscal year, as in INV-2026-000001. There is no screen for that choice yet: ask ASTRO support before the entity issues its first number, because the format is fixed once numbers exist.
Your company's fiscal year is set by an administrator in Company settings: Fiscal year starts in, and Fiscal year in invoice numbers, which says whether a fiscal year is named after the year it starts in or the year it ends in. Once a number carrying the fiscal year has been issued, that choice is fixed.
Rounding
ASTRO rounds every amount to the cent on each line, and a total is the sum of the rounded lines. An exact half cent goes to the even cent (banker's rounding): 2.345 becomes 2.34 and 2.355 becomes 2.36. Issued invoices and credit notes keep the amounts they were issued with.
Sales tax
ASTRO adds the sales tax for the customer's location when a draft is saved; you never type a tax line. Jurisdictions, rates and which products are taxable are set on Tax rates.