[FEATURE]Tax Officer: Tax collection, check tax payee, Generate invoice, confirmation and followup

Develop a way for Tax officers to validate tax collection, Generate an invoice on the fly, send a confirmation to a central gateway and follow up on people who have not done tax payments.

The issue names no files, tests, or entry points; start by reviewing the repository's backend API structure and clarifying the tax officer workflow. Completion would need defined behavior for validating collections, generating invoices, sending confirmations to the central gateway, and following up on unpaid taxes.

Written by the indexing model from the issue text.