SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of ~~February~~May 2024

Commission File No. 1-8887

TransCanada PipeLines Limited

(Translation of Registrants’ Names into English)

450 - 1 Street S.W., Calgary, Alberta, T2P 5H1, Canada

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F o Form 40-F þ

Exhibit 99.1 to this report, furnished on Form 6-K, shall be incorporated by reference into the following Registration Statements under the Securities Act of 1933, as amended, of the registrant: Form F-10 (File Nos. 333-267323 and 333-276558).

EXHIBIT INDEX

99.1 Schedule of earnings coverage calculations at ~~December~~March 31, ~~2023~~2024.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: February 16, 2024	TRANSCANADA PIPELINES LIMITED
Date: May 3, 2024	TRANSCANADA PIPELINES LIMITED
	By:	/s/ Joel E. Hunter
		Joel E. Hunter
		Executive Vice-President and Chief Financial Officer
	By:	/s/ Yvonne Frame-Zawalykut
		Yvonne Frame-Zawalykut
		Vice-President and Corporate Controller

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