I am doing this for the 1st time in 2013. Having paid my 2012 taxes (1040 schedule C) using turbotax, it helped me estimate quarterly payments based on 2012 ear

I am doing this for the 1st time in 2013. Having paid my 2012 taxes (1040 schedule C) using turbotax, it helped me estimate quarterly payments based on 2012 earnings. If I make a lot more or a lot less by mid-year I can make adjustments. I was hoping there was a light weight accounting app that would help me with bids/quotes, invoices, expenses, and taxes all under one roof on the cloud.