Date range from MIN + 12 Months

[sambgv]

hi, community!

so i have the Sales table with columns customer, sales, and date in 01/01/2024 format. What i need is to create a range of sales starting with the first sales month and  ending with the 12th month. So how do I add new columns in Power Query in order to obtain this result? 

In the report i need to display 
1) customers and total generated revenue for the 12 months span starting with the first month of revenue

2). a column with the last month within this 12 month range (per customer)

thank you! 

[lbendlin]

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