Ключевые слова: 800, 2020, accountant, accounting, accounts, administration, benefit, british, calculator, customs, deadline, document, england, english, finance, financial business, form, gb, gbp, great britain, her majesty, hm, hmrc, income, inland, money, paper, paperwork, partner, partnership, payment, pen, pound, reform, relief, return, revenue, sa, sa 800, sa800, self assessment, sterling, tax, taxation, taxpayer, uk, union jack, united kingdom, wages, year,