Calculating Maturity of CD by month

Hello all,

I have been working on a formula to help me calculate the month a CD would mature in a given year.

For example I would like to know when a 13 month CD would mature in the year of 2056

I have written the this to allow me to select the end of the year I want
cell p45 is in months

DATE(YEAR(EDATE(DATE(YEAR(NOW()),1,1),(P45))),12,31)

But I am having problems figuring out what month a CD matures in a given year.

I have attached the excel sheet I am using.

Any help would be appreciated

Thanks