To pay your tax, go to www.irs.gov/payments.
To see the status of your account, you can request an account transcript.
https://www.irs.gov/individuals/get-transcript
Note that if you only recently filed your return, your transcript might not be updated. If you owe and are paying late, you should also expect the IRS will send you a bill for penalties and interest (about 2% per month of the amount owed).
We don't know what third parties you are asking about. If you want to pay your taxes by credit card, you should only use one of the processors listed on the IRS web site. If you owe more than you can pay, you can ask for a payment plan. Third party companies that advertise they can handle your tax debts seem very scammy to me, although some may be legitimate. If you owe more than $10,000, I would recommend you hire a local tax professional to negotiate for you rather than one of these companies. If you owe less than $10,000, you will almost always pay less in the long run if you get a payment plan directly from the IRS (because you avoid the substantial fees of the tax professional or payment company.)
