How does income tax relief work

££
Employment Income80,000.00
Less: Personal allowances(12,570.00)
67,430.00
Tax liability on income:
Taxed at basic rate37,700.00 20%7,540.00
Taxed at higher rate29,730.00 40%11,892.00
19,432.00
Less: EIS Investment Tax Relief10,000.00 30%(3,000.00)
Tax liability after EIS Relief16,432.00
Tax already paid at source under PAYE(19,432.00)
Tax Refund due from HMRC(3,000.00)