Synthetic Control Method

We have written a code in R using the Synthetic Control Method for our study on tax policy. The problem is that it works for the Tax Revenues variable , however, we are also interested in other variables as well such as GDP, unemployment and some other variables, but when we made GDP , say, as a Dependent Variable it seems that the code doesn’t work fully as it did for Tax Revenues variable. We are looking somebody who could fix this issue so that the code works for all our interested variables. As well as we need to make robustness checks and create panel test model with regular panel methods (first difference, fixed effects (country and/or year)).