Advanced Self-Assessment Spreadsheet for HMRC

I need an advanced self-assessment spreadsheet for individual tax purposes that can upload to HMRC in iXBRL format.

Requirements:
- Track and calculate:
- Income and expenses
- Deductions and allowances
- Taxable income and tax liability
- Automated advanced calculations

Ideal Skills:
- Proficiency in Excel or Google Sheets
- Experience with iXBRL format and HMRC submissions
- Strong knowledge of tax regulations and self-assessment processes

Please provide samples of similar work done.