So I know this shouldn’t be all that difficult, and I get the results for my first two outcomes (Blank and 1 Year), but no years past Year 1 provide an answer.
IF({Last Service Date}=BLANK(),BLANK(),IF({Service Frequency}=“1 Year”,DATEADD({Last Service Date}, 365, ‘days’,IF({Service Frequency}=“1.5 Years”,DATEADD({Last Service Date}, 547, ‘days’,IF({Service Frequency}=“2 Years”,DATEADD({Last Service Date}, 730, ‘days’, IF({Service Frequency}=“3 Years”,DATEADD({Last Service Date}, 1095, ‘days’, IF({Service Frequency}=“4 Years”,DATEADD({Last Service Date}, 11460, ‘days’)))))))))))
“Last Service Date” is a Calendar Type and “Service Frequency” is a Single Select Type (Single Line Text had same result). In Excel I can use a different formula that works just fine, but is not recognized here