Limit dateset by timeframe in Query Editor

Thanks ImkeF!

I still have something wrong. Here's the whole advanced editor window. Now I'm receiving a different error:

Expression.SyntaxError: Token Comma expected.

I don't see where there should be a comma. Do I still have something written wrong in the code?

let
Source = Sql.Database("csmdataservice.cloudapp.net", "csm_master"),
dbo_RepairTransaction = Source{[Schema="dbo",Item="RepairTransaction"]}[Data],
#"Added Custom" = Table.AddColumn(dbo_RepairTransaction, "Custom", each if Text.Start([Contract_Number],1)="0" then Text.TrimStart([Contract_Number],"0") else [Contract_Number]),
#"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"Contract_Number"}),
#"Renamed Columns1" = Table.RenameColumns(#"Removed Columns",{{"Custom", "Contract_Number"}}),
#"Inserted Merged Column" = Table.AddColumn(#"Renamed Columns1", "Key", each Text.Combine({[End_Customer_Key], [Contract_Number]}, "|"), type text),
#"Renamed Columns" = Table.RenameColumns(#"Inserted Merged Column",{{"Key", "%BPIDContractKey"}}),
#"Changed Type" = Table.TransformColumnTypes(#"Renamed Columns",{{"List_Price", Currency.Type}, {"Net_price", Currency.Type}, {"Calculated_List_Price", Currency.Type}, {"Unit_Received_Date", type date}, {"Order_Submit_Date", type date}}),
#"Filtered Rows" = Table.SelectRows(#"Changed Type", each [Order_Submit_Date] > Date.AddYears(Date.From(DateTime.LocalNow()), -5)
in
#"Filtered Rows"

Thanks! You're awesome.