I am currently paying Class B PRSI for past 36 yrs, can I take on a small 2nd job of say 15 hours/week & pay a Class A PRSI stamp on the 2nd job at the same time to accumulate tax credits towards a percentage of the State Pension when I reach 66years of age. I have approx 5 years of Class A stamps accumulated prior to moving to the Class B PRSI years ago.