TDL Modification for Tally

I'm seeking an experienced TDL developer to modify our existing TDL code for Tally. The project includes:

- Adding new sales reports
- Including new item specifications fields in vouchers
- Implementing custom user access levels

Ideal Skills and Experience:
- Proficiency in TDL (Tally Definition Language)
- Experience with Tally ERP and report generation
- Strong understanding of user access controls and customizations

Please provide examples of previous TDL work and estimated timelines.