Because The gross Incomes (item 15 & 16) are Reported in Canadian Currency on the NR4 and NR4(OAS) Forms: reported on Canadian Revenue Agency (CRA) Tax Forms.
To be accurately reporting on IRS Form 1040-SR as SSA-1099 for both Canadian Pension Plan (CPP- NR4) & Old Age Security (OAS - NR4) in US Currency.
If you requested direct deposit into your US bank account, Report the total incomes from CPP & OAS as social security benefit (item 6a) on Form 1040-SR. sum up total (in USD) monthly deposits on your US bank (Jan-Dec) monthly checking/saving account statement, add these total $ USD amount in your SSA-1099-SM Statement.
Note: Your Canadian RRSP/RRIF minimum distribution are reported similar to IRS Traditional IRA RMD - Distribution after Age 72. Enter the amount in item # 4b Pensions and Annuities of Form 1040-SR
