Most people skip the settings screen and start billing, then spend months fixing the same three things on every invoice by hand. It is worth ten minutes once. Here is what each field actually controls.
Business name and address
These print on the invoice header, which means they are the version of your business your customer files away and your customer's accountant reads. Getting the address right once is the difference between a clean set of records and a year of invoices with a typo in them. Nothing else in the software can correct this after the fact.
GSTIN — and the state it carries
Entering your GSTIN sets your state automatically, because the state is encoded in the number itself. That matters far beyond the header: your state and your customer's state together decide whether a bill carries IGST or CGST plus SGST. This is the single field with the widest reach in the whole application.
Registration type
Regular, composition, or unregistered changes what the software is allowed to produce for you. A composition dealer issues a bill of supply rather than a tax invoice, and the product should stop you rather than let you raise the wrong document. Set this honestly; it is not a preference.
Return filing frequency
Monthly or quarterly. Which one you are eligible for depends on rules that change, so check it on the GST portal or with your CA — no billing software should be telling you which bracket you fall in, and if yours states a threshold on screen, treat that number as decoration and verify it.
UPI ID
Small field, disproportionate effect. With a UPI ID saved, every invoice carries a way to pay it. An invoice that a customer can pay while looking at it gets paid sooner than one that requires them to find your bank details in an old email.
Invoice look — template and accent colour
Three layouts and a colour picker. This is the least important setting on the page and the one people spend the longest on. Pick one, move on; you can change it later and it will apply to everything you print afterwards.
The one to revisit
- Business name and address — only when they actually change.
- GSTIN — almost never, but a wrong one poisons every invoice, so check it twice today.
- Registration type — whenever your registration changes, and tell your CA the same day.
- Filing frequency — verify against the GST portal, not against what any software says.
The point
None of this is exciting and all of it is leverage. Every field here is something you would otherwise decide again on every single invoice, and deciding the same thing repeatedly is where errors come from.