Add NIC salary thresholds for 21/22 & 22/23 tax year
Also updated the "Lower earnings limit" for 2020 as it looked wrong.
Partially addresses #29 (closed) & #26 (closed)
Edited by Mike Bamford
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Also updated the "Lower earnings limit" for 2020 as it looked wrong.
Partially addresses #29 (closed) & #26 (closed)