Rabbi Yosef Berger, one of the rabbis of the Kever Dovid, in an interviuew with Arutz Sheva that it is possible to reach “wonderful levels” on Rosh Hashanah even without flying to R’ Nachman’s grave in Uman.
“Many (gedolim) say that the Tikkun Haklali – the ten perakim of Tehillim that R’ Nachman chose as especially effective for tikkunim – can be said at Kever Dovid on Rosh Hashana or earlier, and achieve the same tikkun as at R’ Nachman’s kever.
He says the place’s lofty levels has been known for years, and thousands have visited Kever Dovidb since the beginning of of Elul. “Every Jew who says those ten perakim of Tehillim here, even on erev Rosh Hashanah, is like he went to Uman.”
Read more at Arutz Sheva.