public void UpdateRecord(string name)
{
IncomeRecord record = records.FirstOrDefault(x => x.HolderName == name);
decimal oldIncome = record.Amount;
string prompt = $"? Old Income: {oldIncome}; Enter new income ";
string errorMessage = "! Invalid input - please enter income as a positive decimal value";
decimal newAmount = Terminal.DecimalInput(prompt, errorMessage, false);
record.UpdateAmount(newAmount);
record.UpdateNetAmount(taxMachine.ApplyTaxation(record.Amount));
}
