As per Section 24 of the CGST Act 2017 , Persons making Inter State Taxable Supply are mandatorily required to get Registration under GST irrespective of any threshold limit.
But the Government has given certain Exemption by Notification regarding Inter-State Taxable Supply of Services.
As per Notification No. 10/2017-CT, dated 13-10-2017, person making Inter State Supplies of taxable SERVICES shall not require to comply with the provision of Section 24 (i) i.e. to get Registration under GST, if his Aggregate Turnover does not exceeds Rs.20 lakhs/Rs.10 lakhs for Special Category States except J&K.
So in your case, if your Aggregate Turnover [ defined u/s 2(6) of the CGST Act 2017 ] does not exceeds Rs. 20 lakhs , then you can do Inter State Taxable Supply of SERVICES without taking Registration under GST.