I got a spot of tar on my light beige microfiber sofa cushion

Hello Nicole! There are a number of suggested methods to remove tar from fabric -- they can be found on the Internet. They range from using WD-40 to peanut butter. However with microfiber, it may be a little more difficult and that's why I'm recommending that you contact a professional to remove the tat; otherwise, you may damage your fabric.

Try in an inconspicuous spot first. Check under the cushions, on the deck of the sofa, for a label that states what can be used to clean it:

http://www.tricafurniture.com/fabrics-finishes/fabric-cleaning-codes/

https://www.thriftyfun.com/tf47159130.tip.html

http://homeguides.sfgate.com/tar-out-sofa-28779.html

http://homeguides.sfgate.com/tar-out-sofa-28779.html

See if this helps.

http://homeguides.sfgate.com/tar-out-sofa-28779.html

goo gone has a product to remove tar from fabric

have you tried hair spray?

Try pink solution available at Costco on line