I got my 2018 tax filed through valuetax. Got notice from IRS with lot of penalties to pay back the dues. ValuesTax are very careless and blamed their software and they don't have experience with filing Taxes and running the show from outside the country. I recommend not to use their service.
Also, I got audited for 2016 and had to pay Tax assessment with huge penalties and interest and the valuestax team was unable to produce proper explanation and they said they are not liable for any issues arising from filing. They are a bunch of team just looking for tax fees. I wouldn't recommend these unethical team for anyone.