SSRS- Require an expression in current matrix to sum values based on previous month although parameter filters on current month

Question

SSRS- Require an expression to sum amount based on previous month although parameter filters on current month

Answer 1

Sorry, but for me your post is more then unclear and contain nearly no usefull informations.
Please post more details, like data structure, report design and a detailed description about the expected result.

although parameter filters on current month

Also here I don't understand, what you mean and what for parameter you have in your report.

One short sentence is really to less.

Answer 2

Hi @Navi Kamarthapu
I'm not very clear on the parameters and detailed report design you used, but maybe the DateAdd function can help you.
In SSRS, DateAdd function can provide a date range based on a single parameter. For example, this expression can provide the date one month before the parameter date in SSRS.

=DateAdd(DateInterval.Month, -1, Parameters!StartDate.Value).  

DateAdd can also be used in queries, you can use it for sum queries and you can refer to this link: dateadd-transact-sql.
Best regards,
Aniya