Expense Tracking and Reporting System

Help me build an expense tracking system in Excel or Google Sheets:

**Expense Types:**
- Personal or Business: [specify]
- Categories needed: [list main expense categories]
- Payment methods: [cash, credit cards, etc.]

**Tracking Requirements:**
- [ ] Date of expense
- [ ] Vendor/payee
- [ ] Amount
- [ ] Category
- [ ] Payment method
- [ ] Receipt attachment/reference
- [ ] Tax deductible flag
- [ ] Project/client allocation
- [ ] Reimbursable flag

**Data Entry:**
- Entry method: [manual / form / import]
- Frequency: [daily / weekly / batch]
- Multiple users: [Yes/No]

**Reports Needed:**
- [ ] Monthly summary by category
- [ ] Budget vs actual comparison
- [ ] Trend analysis
- [ ] Category breakdown charts
- [ ] Tax-deductible expense report
- [ ] Reimbursement report

**Budget Integration:**
- Budget amounts available: [Yes/No]
- Alert when over budget: [Yes/No]

Please provide:
1. Data entry sheet structure
2. Category dropdown setup
3. Summary report formulas
4. Pivot table recommendations
5. Dashboard with key metrics
6. Month-end reconciliation process