Invoices aren't a uniform bunch. Its general format changes very much based on the industry and location. The two options would be to either target a niche aud

Invoices aren't a uniform bunch. Its general format changes very much based on the industry and location. The two options would be to either target a niche audience initially and grow from there, or focus on building a general purpose solution that can cater to a dynamic range of requirements. The second option might not be particularly wise in the early stages.